Cooking utensil.



L. S. LAGHMAN.

COOKING UTENSIL.

APPLIGATION FILED 0UT.28,1905.

1,034,805, Patented Aug. 6, 1912.

(mnlllll n?. i bmw/wm @mm @mA/?? ment of parts having UNTED STATES PATENT OFFICE.

LAURENCE S. LACHLIAN, OF NEW YORK, N. Y.

COOKING UTENSIL.

Application led October 28. H105.

vented certain ner.- und useful lmprove` ments in Cooking Utensils. of which the ollowing is a specification, accompanied by drawings.

This invention relates to different kinds ot' utensils, more particularly cookingutensils, such as coflee pots, tenpots, pitchers, and all kinds of sheet metal utensils in which separate spouts are to he attached. It has heretofore been customary to attach these spouts to the sheet metal utensil by means of rivets and then enamel the utensil thcreover. but the rivet heads then form unsightly places in the enamel und :ire apt to crack the enamel. Furthermore, it is diflicult to obtain tightjoints by means of rivets and the process Vis otherwise expensive und unsightly.

The objects of this invention are to do away with the difficulties experienced in this class of work and improve upon the construction of such utensils having spouts b v electrically welding the spouts to the body of the utensils. By this means the unsightly appearance of riveting is avoided and u smooth unbroken surface is afforded for the subsequent enameling. By electrically welding the spouts to the utensils a milch stronger union is afforded than by moans of rivets or by 'means of interlocking connections ot any kind, and the disadvantage and liability of corrosion are also avoided because the weld makes the spout an integral part of the body of l'the utensil and lea'ves practically no in'terstices for the collection of impurities and .acids Further objects vof the invention will hereinater appear and to these 4ends the invention consists Aof utensils and methods of making same for carrying out the above objects embodying the features of construction, combinations Oelements, ond arrangeeperation substantie y as hereinafter fully described and asclaimed in this specification .and as shown in the accompanying drawin s` in Which,-

igure l isa horizontal vertical sectional view taken through the .dies of a suitable welding machine end a coffee pot. in position .therein -xeady .for welding Ythe :spout to the Specieationio Letters Patent. l

the general mode ofA Patented Aug. 6, 1912.

serial No. 284.905.

l pot; Fig. 2 is a transverse sectional elevai tion of Fig. 1; Fig. 3 is an enlarged detail {scctionnl longitudinal view taken through 't the portions of the pot which are in posii tion to he welded. that is the base of the spout and the/hotly of the pot; Fig. 4 is a view similar A"to Fig. 3 showing the parts utter the wclds have been completed; Fig. 1' is nn inside face view of the perforated plate which goes over the hole` in the body rear view of the spout detached from the body of the pot showing-the construction of the saine.

In welding spouts to coffee pots, or spouts or projections toall kinds of uter'isils` the first condition encountered is the fact that the sheet metal both of the spout and ofthe hodv of the pot is very thin becauseiutensils sheet. metal.- A process must therefore be devised which will either weld two very thin must he devised by means of which a thick sheet ofiretal may be utilized in the weld. Further-more certain standard constructions nre now inl use in unitingl the spout of u sheet. metal coffee pot. for inst-ance, to the. body of the utensil, and in carrying out my invention I have devised a method of-seeuring the spout to the body` which in no way changes the standard method, but is simply an addition thereto in connection with my process of electric welding, and I amenabled to use a thick sheet of metal welded to a thin sheet. to secure the spout vto the body.

I have discovered that in order to obtain the best results-in Welding a verv thin sheet raf/metal like the bod?,r of a coffee pot to a substantially thicker. sheet of metal., three or four gages thicker. it is preferable -to pro- -vide points or projections forming contacts' in which the spout is inserted; Fig. 6 is a' of this character are not. made of very thick v sheets of metal together, or else a scheme los points to embed themselvesin the heated thin metal, thereby making a perfect Weld without projecting through on the other side of the thin sheet. I.

5 It has been proposed to weld two thick sheets or two thin sheets together by means of points or projections placed in contact one with the other. This has been found a satisfactory method for two comparatively thick sheets, but when the sheet-s of metal are very thin like the sheet metal of a coffee pot or other utensil, the resistance aflorded to the current is so great that if it carries such welding points or projections not only are the points melted but portions of metal around the points are also melted to such an extent as to make a weak weld, which may be torn apart. On the other hand, it is difficult to weld points directly against .the flat. surface of a sheet of metal when both sheets' are of substantial thickness because the points are melted, but there is not suflicient resistance in thel thick sheet of metal to heatsaid metal all the way through and there` 26 fore a superficial weld is formed. Such thick metal is too conductive both for heat and electricity and on a plane surface there is little opportunity for such localized development of high temperature as is necessary for a point weld. Y

According to the present invention I am enabled to secure a firm, permanent, and com lete union between pieces of| thin metal by tiie use of a piece of thicker metal in the manner hereinafter set forth.

In the accompanying-drawings, A represents the body of a thin sheet metal coffee pot or other utensil, and B represents t-he thin sheet metal spout for said utensil. In accordance'with the usual practice, the body of the pot or utensil is provided with an apcrture C, through which the spoilt B is thrust and the flange D on the spout then bears against t-hc body of the pot around the inside of the aperture C as' indicatcd in the figures. Ordinarily this flange D would be suitably riveted to thc pot, or else interlocking connections would be formed between the metal of the body and the metallic flange D and perhaps rivets would be used in addition. In all such cases the rivets would project through the body of the pot and would show on the outside around the spout and would not be covered completely by thc enamel. According to this present invention I use an additional sheet of metal E, which. as shown, is of substantial thickness and is several gages thicker than the metal, A of the pot. This additional sheet E is provided with perforations through which the material may flow from the pot through the spout B and this plate E is of sufficient sizeto cover the hole C and extend around outside of the flange D of the spout. Upon the plate E I provide projections or contact lpoints F which may be suitably formed in the metal of the-plate E or pressed out of the same in an suitable manner. Preferably the flange is provided with notches G which register With the projections F on the plate E and serve to center the spout in the aperture C. v

After the spout has been placed in position in theaperture C, the pot is placed ina suitable split die, comprising the parts H and I, which are recessed to accommodate the spout and'have a curved surface to accommodate the curve of the pot. The plate E is then placed'in posit-ion over the hole C and the top die J is brought down upon said plate E. y Electric connection is formed between the top-and bottom dies through the coffee pot from the generator K, provided with the switch L. As the circuit is completed through the plate E and contacts F and body portion A of the pot, the dies are brought together and the sheets are pressed one upon the other, thereby forming a complete Weld.

The plate E is of such thickness relatively to Vthe body port-ion A of the pot that the weld does not show on the outside of the pot or shows to such a small extent that the enameling on the outside ofthe pot completely obliterates all traces of the weld. In other Words, the thin metal of the body portion A of the pot is` not fused or melted to such an extent as to weaken the Weld, but is only heated and softened sutiiciently to in corporate the contact points therein and form an autogenous and inte al union therewith. It is to be observe that the notches G on the flange D of the spout substantially register with the points or projections F and touch the same when the plate E is placed in position so that in most cases the edges of the notches G will be Welded to the plate E and to the body A of the pot although this is not an essential feature of the invention. It does, however, make a 110 stronger and more perfect union between the parts.

I have shown in the drawings and described a suitable method for making a. utensil by securing the spout to the utensil 115 by means of a special binding piece of metal, but the invention also contemplates directly welding the flange of the spout to the body of the utensil in any one of the different ways by means of which this can be accom- 120 plished, and the binding piece of thicker metal may be merely an annular ring.

The points or projections formed upon one of the sheets in carrying out this process are, as shown, widely separated and in- 125 dependent one from the other and the series of points is of substantiall the same total effective contact area as t e total area of the final welds formed at the points. According to this mode of operation the plates 130 may be said to be electrically riveted at separated and independent points.

According to this invention the sheet metal utensil comprises in combination a spout and a. binding piece of sheet met-al electrically welded to the body of theutensil at a. multiplicity of distinct and separate welds or unions formed at a multiplicity of Contact spots between the opposing surfaces of the metal.

Obviously some features of this invention may be used without others and the inven` tion may vbe embodied Ain widely varying forms.

'Theref0re, without limiting the invention to the precise steps of the process described or to an article such as shown in the drawings, .I claim and desire to obtain Letters Patent `for the following:

l. A thin sheet rietal'utensil provided with a' spout having an upturned end forming a. base, said spoilt held in position upon said utensil by means of a binding piece of metal surrounding and holding the base of said spout by means of a plurality of distinc-t-'and 'separate spots of integral union formed between the binding piece and the body of the utensil.

'2. A thin sheet nieta] utensil provided with a spout having an upturned end forming a base, said spout held in position upon said utensil by means of a binding piece oi"V metal surrounding and holding the base of said spout by means of a plurality of dis'- tinct and separate spots of integral union formed between the binding piece and the body of the utensil, said binding piece. being of thicker metal than the body of the uten 4. A thin sheet nieta'l utensil provided with a spout having an upturned end forming a base. said spout held in position upon said utensil by means ot' a binding piece of metal .surrounding and holding the base of Said spout. by means ot' a plurality of distinct and separate spots of integral union formed between the binding piece and the body of the utensil, said base being pro-' vided with a series of notches which register with the spots of welded union.

ln testimony whereof [have signed this specification in thc presence of two subscribing witnesses.

LAURENCE S. LA-CHMAN. litnesses O. A. Fos'rnu, A. L. OBRIEN. 

